David gumming



No. 39,890; PATENTED SEPT. '15, 1863.

1). CU MING, JR. 00 m AND LETTER SCALE,

77%Ze-JQJ I M M v m 9%, 7k

- A is the standard, with the bearings B B,

- edges are firmly secured to the beam 0, one end of which has thespring-holder-D swing- UNITED STATES,

PATENT OFFICE.

DAVID OUMMING, m,

IMPROVEMENT N COIN Specification forming-part of Letters Patent-No.

39,590, dated September 15,1863; ante-dated February2, 1863.

To all iohpm, it may concern.- 7

I Be it known that 1, DAVID CUMMING, J r.,

of New York, county and State of New 'York, have invented a new anduseful Improvement in (Join and Letter Scales; and I do hereby declarethat the following is a full, clear, andcxactilescription of thecoiistruction and operation of the same, reference being had to theannexeddrawings, making a part of this specification, in which- Figure'lis a perspective view; Fig. 2, a longitudinal elevation, and Fig. 3 ahorizonfill plan of the top.

The same letters refer to corresponding p ms in the difl'erent figures.

on which the knife'edges w :0 rest. The knife iug freely from it on aknife edge. F is a weight, which is attached to the beam bythe pivot G.The weight moves freely on the pivot, and is held where required by thespiral spring H on the pivot. Attached to the weight is the curved plateJ, containing the marks I and figures of the denomination of thedifl'erent coins, and also the marks and figures indicatin'g an ounceand parts of an ounce for weighing letters. p

- Manner of working: The coin to be weighed is placed in thespring-holder, and the weight moved'aronnd on the pivot until the markof the denomination of the coin on the curved plate is directly underthe index K-on the beam. If the coin is of the proper weight, the beamwill be inclined toward the end on which the coin hangs. Lettersareweighett in the same manner.

The machine has been tried and works well, and can, be manufactured at asmall cost.

What I claim as new, and desire to secure by Letters Patent, is-

The pivoted weight F and curved plate J,

operated substantially as described, and for the purpose set forth.

D. GUMMING, JR.

Witnesses:

STEPH. WM. SMITH, J. S. TUTTLE.

